Home / 149,155.50-205,834.62-81,172.74

Finding the Fourth Proportional to 149,155.50, 205,834.62 and 81,172.74

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Solution

The fourth proportional to 149,155.50, 205,834.62 and 81,172.74 is: 112,018.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,155.50 : 205,834.62 = 81,172.74 : x
  2. Step 2: Convert to fraction form
    149,155.50/205,834.62 = 81,172.74/x
  3. Step 3: Cross multiply
    149,155.50x = 205,834.62 × 81,172.74
  4. Step 4: Simplify right side
    149,155.50x = 16,708,160,092.26
  5. Step 5: Solve for x
    x = 16,708,160,092.26/149,155.50
  6. Step 6: Final answer
    x = 112,018.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.